OK, let's crack this. We're given 652 and our task is to multiply it by 4. Essentially, we'll be adding 652 to itself 4 times.
Step 1: 0 + 652 = 652
Step 2: 652 + 652 = 1304
Step 3: 1304 + 652 = 1956
Step 4: 1956 + 652 = 2608

So, 652*4 = 2608